How to manage and maintain heavy snow solar terms farming?

    Heavy snow is one of the twenty-four solar terms, and the third solar term in winter. It is a heavy snow solar term when the sun reaches 255 degrees of yellow longitude around December 7 each year. Heavy snow, as the name suggests, the amount of snow is heavy and the weather is even colder. The heavy snow solar terms indicate the starting time and amount of heavy snowfall. It is the same as the solar terms such as light snow, rain, and valley rain, and it is a solar term that directly reflects precipitation. During the heavy snow season, most parts of China have entered winter, and the minimum temperature has dropped to 0℃ or below. In areas where the strong cold air fronts cold and warm air confront each other, heavy snow or even blizzard will occur. At this time, due to the cold weather, the cold bird no longer sings; at this time, the yin energy is at its strongest, the yang energy has germinated, and the tigers have begun courtship behavior; the Malanhua is said to be able to feel the yang energy to sprouting and take out new buds. The snow at this time can not only keep warm and moisturize the winter wheat, but also freeze some eggs on the soil surface. But too much snow will also adversely affect some facility agriculture.

    Greenhouse pays attention to daily management

    Regulate suitable growth environment conditions. It is necessary to uncover and cover the thatch in a timely manner according to the weather and indoor temperature. However, it is necessary to see more light and release the air at the right time, especially after watering and on cloudy days.

    Strengthen plant adjustment and fruit management

    Get rid of the side branches that grow on the plant and the old, yellow, and diseased leaves in the lower part in time to strengthen ventilation. For tomatoes that are cultivated in a long-season overwintering, vine vines or continuous head changes should be adopted to extend the fruiting period of the plants.

    Scientific watering

    Watering should be done in the morning on a sunny day, and do not water on cloudy or snowy days. Using drip irrigation, micro-spraying or under-membrane irrigation is helpful to increase ground temperature and save water. Set up water storage tanks or storage tanks in the greenhouse to increase the temperature of the irrigation water; when watering, the amount of water should not be too large each time, and water management should be carried out according to the principles of "small water frequently" and "seeing dry and wet".

    Reasonable fertilization

    Topdressing is carried out according to the characteristics of crops' fertilizer requirements and plant growth, and balanced fertilization of nitrogen, phosphorus, potassium and trace elements. Special attention is paid to the application of potassium fertilizer, which has the effect of enhancing the cold resistance of plants.

    Timely harvest

    Tomatoes and other melons and fruit crops are harvested in time at the best ripening period of the fruit to prevent redundant seedlings and affect the continued fruit of the plants. Try to harvest in the morning on a sunny day, and handle with care during picking, storage and transportation.

    Do a good job of snow and cloudy management

    In snowy days, clear the snow on the shed in time to prevent the snow from melting on the grass thatch or the heat preservation quilt and reduce its heat preservation effect. After the snowfall stops and when it is cloudy, the grass thatch can be opened around noon under the premise that the temperature in the greenhouse is above 12 ℃, so that the crops can receive scattered light.

In case of prolonged overcast and sunny weather, the grass thatch should be cut one piece apart, or the heat preservation should be rolled up in half to prevent the plants from wilting due to excessive sunlight; top dressing, watering, pruning and thinning should not be carried out on snowy and cloudy days. Fruit and other agricultural operations. For some greenhouses with large spans and poor skeleton firmness, the scaffolds should be supported and reinforced in time to prevent the sheds from collapsing when it snows.